Fix import of folder with only failed files.
Fix upload failure handling. (see #11061)
Fix import notification of non valid file (see #11053)
Fix upload of files w/o import candidates.
Update submodules
Merge pull request #1232 from snoopycrimecop/merge/develop/submodules

Update develop submodules
Merge pull request #1259 from jburel/import-notification

Import notification